Backless bra



FIG. 1 is a front perspective view of a backless bra, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, whereas the right side elevational view being a mirror image;

FIG. 5 is a is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the drawings are for environmental structure only and form no part of the claimed design. 

The ornamental design for a backless bra, as shown and described. 